The Hangover area is underlain by Devonian to Permian marine sedimentary and volcanic rocks of the Stikine Assemblage which area overlain by marine sedimentary and volcanic rocks of the Upper Triassic Stuhini Group. Lower Jurassic rock of the Hazelton groups overly the Stuhini rock in the region.
The volcanic and sedimentary sequences were intruded by the Tertiary-Cretaceous Coast Plutonic Complex. A wide variety of intrusive phases are present including granodiorite, quartz monzonite and diorite. Small satellitic plugs from the main batholith are important for localizing mineralization.
The predominant lithologies on the property consist of marine sediments, volcaniclastics and volcanic flows mainly of the Lower Jurassic Hazelton Group. A mass of quartz diorite, which is probably associated with the Lower Cretaceous Coast Plutonic Complex, intrudes the stratigraphic sequence in the southwest corner of the property.
A sedimentary facies appears to predominate at lower elevations along the Jekill River valley on the western side of the claim group. Volcaniclastics, agglomerates and flows become more prevalent higher in the section towards the centre of the property on the east side of the Jekill River.
A silver showing carrying up to 438.8 grams per tonne silver and 1.7 per cent copper occurs on the northwestern edge of the property on the west side of the Jekill River (Assessment Report 13244). The showing is called the Hangover Trench and consists of thin 1 to 3 centimetre wide, quartz and carbonate veins trending 045 and 315 degrees within brecciated and silicified rhyodacite or felsite. The breccia fragments are cemented by a quartz, carbonate and potassium feldspar matrix. Mineralization consists of freibergite, tetrahedrite, chalcopyrite, malachite, azurite, pyrite, pyrrhotite and galena. Clay and sericitic alteration is associated with the veins. Similar, but less extensive, veins containing the same mineralization occur on the property south of the trench and west of the Jekill River.
In 1987, a grab sample from the Hangover Trench assayed 0.17 grams per tonne gold, 709.7 grams per tonne silver, 1.05 per cent copper, 0.37 per cent lead and 0.18 per cent zinc. Another grab sample assayed 0.07 gram per tonne gold, 718.96 grams per tonne silver, 1.07 per cent copper, 0.15 per cent lead and 0.20 per cent zinc (Property File: Ikona, C.K., 1987).
Work History
The first work recorded on the ground was performed by Anaconda Canada Exploration Ltd. for a Skyline Exploration Ltd., Placer Development Ltd. and Anaconda joint venture on the Burnie 14, Reg 10 and Stanley 7 claims around 1983. This program was carried out to follow-up on a helicopter-borne geophysical survey and consisted of geological mapping and limited trenching, prospecting, reconnaissance ground geophysics and stream sediment sampling. A total of 28 heavy mineral stream sediment samples and 20 rock samples were collected during the course of this program. The trenching and the five associated rock samples and the ground geophysics were conducted over an area just west of the present Eldorado claims. Anaconda’s work defined a silver-copper-lead-zinc-iron carbonate vein showing off the present Eldorado property with anomalous copper in heavy sediments in First Basin and anomalous gold in heavy sediments in Second Basin.
A total of 920 km of an electromagnetic/resistivity/magnetic survey was flown in 1983, over the Burnie 1-4, Stanley 7, Sky 1-3, Cooee 1-3 and Meg 10 claims, a property held by Placer Development Limited over east of the confluence of the Craig and Jekill rivers Assessment Report 11327).
In 1987, Androne Resources Ltd completed an exploration program on the Burnie 1-4 and Dan l-3 claims. Their work was comprised of geological mapping and prospecting (139 samples), silt sampling (56 samples) and contour soil sampling (272 samples). This program identified the Grace 2 showing, a northwest-trending shear zone with silicification and pyritization with malachite and which yielded significant gold, silver and copper assays. Androne also discovered the Grace 1 showing, a similarly-trending and mineralized shear zone, also with chalcopyrite and azurite.
Androne resources reports states that a silver showing excavated by the Hangover trench assayed up to carrying up to 438.86 grams per tonne silver and 1.7 per cent copper was previously trenched in 1984 by Anaconda Canada Exploration Ltd. on the northwestern edge of the claim group (Burnie 1-4; Dan 1-3 claims) (Assessment Report 16957). Similar but less extensive veins were noted south of the trench on the west side of the Jekill River.
Pezgold Resources Corp. conducted an exploration program in 1988 that was, in part, a continuation of the 1987 program that was halted due to adverse weather conditions. This program entailed grid-based soil sampling and VLF-EM surveys over the Grace showings and four trenches totalling 37 metres over the Grace 2 showing. A total of twelve chip samples were collected from two of these trenches. Results from these trenches were erratic and discouraging with maximum values of 11.9 grams per tonne gold and1.5 per cent copper over 20 centimetres. The soil survey identified numerous, multi-station, but discontinuous anomalies with the strongest response in gold and base metals in the northern part of the grid (near the Grace 1 showing) and the strongest response in gold and silver in the southern part of the grid. A total of 5.3 line-kilometres of VLF-EM surveying was conducted over this same grid. The most pronounced anomaly outlined by this survey was associated with the Grace 1 showing. Several samples were taken at the Second Basin North showing. No mention is made of the Hangover Trench.
The Burnie and Dan claims were allowed to lapse in the fall and winter of 1994 and were restaked in 1995 by David Javorsky as the Eldorado l-4 mineral claims (on the east side of Jekill River only). Javorsky carried out a limited program of prospecting in the Second Basin area including heavy mineral stream sediment sampling, and re-evaluation of the previous trenching.
In 1996, a total of 115 soil samples and 21 rock samples were collected by Golden Band Resources Inc on the Eldorado claims (Assessment Report 25009).
